Weaponry Customization
You´ll be able to customize scopes, lights, laser sights, and silencers. You can take one item from one weapon and put it on another.
Nano Suit
You´ll be able to enhance your strength, armor, speed, and stealth. The nano suit is powered by an onboard fusion reactor that channels energy. In armor mode, the suit will take on a near liquid state that helps absorb damage. It will also slowly restore your health.
The nano suit is actually based on real designs for military suits to be used in approximately 15 years time (with some of their own modifications of course)
Graphics & DX10 enhancements
Shadows are now soft, dynamic, terrain has support for voxel technology to offer real 3d carving, physics does support real-time breaking of vegetations, soft-deformations, advanced vehicles and an improved human physics.
Expect to see a higher degree of immersion and visual density of all simulations - that is improved lighting simulations, volumes and particles and shawdows will feel more crisp. Cevat states that DX10 has allowed Crytek to reach their video-realism goal made two years ago.